155047 has 2 divisors, whose sum is σ = 155048. Its totient is φ = 155046.

The previous prime is 155027. The next prime is 155069. The reversal of 155047 is 740551.

It is an a-pointer prime, because the next prime (155069) can be obtained adding 155047 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155047 - 2¹⁵ = 122279 is a prime.

It is a Chen prime.

It is a nialpdrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77523 + 77524.

It is an arithmetic number, because the mean of its divisors is an integer number (77524).

2¹⁵⁵⁰⁴⁷ is an apocalyptic number.

155047 is a deficient number, since it is larger than the sum of its proper divisors (1).

155047 is an equidigital number, since it uses as much as digits as its factorization.

155047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 155047 is about 393.7600792361. The cubic root of 155047 is about 53.7222824462.

Adding to 155047 its reverse (740551), we get a palindrome (895598).

The spelling of 155047 in words is "one hundred fifty-five thousand, forty-seven".